The Xiaomi 15 supports Bluetooth audio sharing, which is a feature that allows you to stream audio to two Bluetooth devices simultaneously, such as sharing music or a call with two sets of wireless headphones or speakers.
For your reference, here are the advantages of Bluetooth audio sharing on the Xiaomi 15:
1. With this feature, you can play music across different Bluetooth speakers at the same time for a bigger sound;
2. A more immersive multi-room or stereo will be created;
3. Bluetooth audio sharing provides more power-efficient and better sound quality and supports more devices connected at once.